whelk [hw?lk, w?lk] n.青春痘

acne [??kni] n. 粉刺；痤疮

pimple [?p?mp?l] n. 丘疹；脓疱

He is sleeping poorly.

他睡不好。

My eyes feel itchy and I have been sneezing.

我眼睛发痒还打喷嚏。

He has a sore throat and a stuffy nose.

他嗓子疼，而且鼻子还堵住了。

He has difficulty in sleeping, inability to concentrate.

他不易入睡，也难集中精神。

How can I stop my roommate from grinding his teeth? It really drives me crazy. I am not asleep! 

怎样才能让我的室友不再磨牙，我真的是要疯了，完全睡不着啊。